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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">mod_parallels_xld</span><span data-if="c" style="display:none;">mod_parallels_xld</span><span data-if="cpp" style="display:none;">ModParallelsXld</span><span data-if="dotnet" style="display:none;">ModParallelsXld</span><span data-if="python" style="display:none;">mod_parallels_xld</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">mod_parallels_xld</span><span data-if="c" style="display:none;">mod_parallels_xld</span><span data-if="cpp" style="display:none;">ModParallelsXld</span><span data-if="dotnet" style="display:none;">ModParallelsXld</span><span data-if="python" style="display:none;">mod_parallels_xld</span></code> — Extract parallel XLD polygons enclosing a homogeneous area.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>mod_parallels_xld</b>(<a href="#Parallels"><i>Parallels</i></a>, <a href="#Image"><i>Image</i></a> : <a href="#ModParallels"><i>ModParallels</i></a>, <a href="#ExtParallels"><i>ExtParallels</i></a> : <a href="#Quality"><i>Quality</i></a>, <a href="#MinGray"><i>MinGray</i></a>, <a href="#MaxGray"><i>MaxGray</i></a>, <a href="#MaxStandard"><i>MaxStandard</i></a> : )</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>mod_parallels_xld</b>(const Hobject <a href="#Parallels"><i>Parallels</i></a>, const Hobject <a href="#Image"><i>Image</i></a>, Hobject* <a href="#ModParallels"><i>ModParallels</i></a>, Hobject* <a href="#ExtParallels"><i>ExtParallels</i></a>, double <a href="#Quality"><i>Quality</i></a>, const Hlong <a href="#MinGray"><i>MinGray</i></a>, const Hlong <a href="#MaxGray"><i>MaxGray</i></a>, double <a href="#MaxStandard"><i>MaxStandard</i></a>)</code></p>
<p>
<code>Herror <b>T_mod_parallels_xld</b>(const Hobject <a href="#Parallels"><i>Parallels</i></a>, const Hobject <a href="#Image"><i>Image</i></a>, Hobject* <a href="#ModParallels"><i>ModParallels</i></a>, Hobject* <a href="#ExtParallels"><i>ExtParallels</i></a>, const Htuple <a href="#Quality"><i>Quality</i></a>, const Htuple <a href="#MinGray"><i>MinGray</i></a>, const Htuple <a href="#MaxGray"><i>MaxGray</i></a>, const Htuple <a href="#MaxStandard"><i>MaxStandard</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>ModParallelsXld</b>(const HObject&amp; <a href="#Parallels"><i>Parallels</i></a>, const HObject&amp; <a href="#Image"><i>Image</i></a>, HObject* <a href="#ModParallels"><i>ModParallels</i></a>, HObject* <a href="#ExtParallels"><i>ExtParallels</i></a>, const HTuple&amp; <a href="#Quality"><i>Quality</i></a>, const HTuple&amp; <a href="#MinGray"><i>MinGray</i></a>, const HTuple&amp; <a href="#MaxGray"><i>MaxGray</i></a>, const HTuple&amp; <a href="#MaxStandard"><i>MaxStandard</i></a>)</code></p>
<p>
<code><a href="HXLDModPara.html">HXLDModPara</a> <a href="HXLDPara.html">HXLDPara</a>::<b>ModParallelsXld</b>(const HImage&amp; <a href="#Image"><i>Image</i></a>, HXLDExtPara* <a href="#ExtParallels"><i>ExtParallels</i></a>, const HTuple&amp; <a href="#Quality"><i>Quality</i></a>, Hlong <a href="#MinGray"><i>MinGray</i></a>, Hlong <a href="#MaxGray"><i>MaxGray</i></a>, const HTuple&amp; <a href="#MaxStandard"><i>MaxStandard</i></a>) const</code></p>
<p>
<code><a href="HXLDModPara.html">HXLDModPara</a> <a href="HXLDPara.html">HXLDPara</a>::<b>ModParallelsXld</b>(const HImage&amp; <a href="#Image"><i>Image</i></a>, HXLDExtPara* <a href="#ExtParallels"><i>ExtParallels</i></a>, double <a href="#Quality"><i>Quality</i></a>, Hlong <a href="#MinGray"><i>MinGray</i></a>, Hlong <a href="#MaxGray"><i>MaxGray</i></a>, double <a href="#MaxStandard"><i>MaxStandard</i></a>) const</code></p>
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<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>ModParallelsXld</b>(<a href="HObject.html">HObject</a> <a href="#Parallels"><i>parallels</i></a>, <a href="HObject.html">HObject</a> <a href="#Image"><i>image</i></a>, out <a href="HObject.html">HObject</a> <a href="#ModParallels"><i>modParallels</i></a>, out <a href="HObject.html">HObject</a> <a href="#ExtParallels"><i>extParallels</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Quality"><i>quality</i></a>, <a href="HTuple.html">HTuple</a> <a href="#MinGray"><i>minGray</i></a>, <a href="HTuple.html">HTuple</a> <a href="#MaxGray"><i>maxGray</i></a>, <a href="HTuple.html">HTuple</a> <a href="#MaxStandard"><i>maxStandard</i></a>)</code></p>
<p>
<code><a href="HXLDModPara.html">HXLDModPara</a> <a href="HXLDPara.html">HXLDPara</a>.<b>ModParallelsXld</b>(<a href="HImage.html">HImage</a> <a href="#Image"><i>image</i></a>, out <a href="HXLDExtPara.html">HXLDExtPara</a> <a href="#ExtParallels"><i>extParallels</i></a>, <a href="HTuple.html">HTuple</a> <a href="#Quality"><i>quality</i></a>, int <a href="#MinGray"><i>minGray</i></a>, int <a href="#MaxGray"><i>maxGray</i></a>, <a href="HTuple.html">HTuple</a> <a href="#MaxStandard"><i>maxStandard</i></a>)</code></p>
<p>
<code><a href="HXLDModPara.html">HXLDModPara</a> <a href="HXLDPara.html">HXLDPara</a>.<b>ModParallelsXld</b>(<a href="HImage.html">HImage</a> <a href="#Image"><i>image</i></a>, out <a href="HXLDExtPara.html">HXLDExtPara</a> <a href="#ExtParallels"><i>extParallels</i></a>, double <a href="#Quality"><i>quality</i></a>, int <a href="#MinGray"><i>minGray</i></a>, int <a href="#MaxGray"><i>maxGray</i></a>, double <a href="#MaxStandard"><i>maxStandard</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>mod_parallels_xld</b>(<a href="#Parallels"><i>parallels</i></a>: HObject, <a href="#Image"><i>image</i></a>: HObject, <a href="#Quality"><i>quality</i></a>: Union[float, int], <a href="#MinGray"><i>min_gray</i></a>: int, <a href="#MaxGray"><i>max_gray</i></a>: int, <a href="#MaxStandard"><i>max_standard</i></a>: Union[float, int]) -&gt; Tuple[HObject, HObject]</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">mod_parallels_xld</span><span data-if="c" style="display:none">mod_parallels_xld</span><span data-if="cpp" style="display:none">ModParallelsXld</span><span data-if="com" style="display:none">ModParallelsXld</span><span data-if="dotnet" style="display:none">ModParallelsXld</span><span data-if="python" style="display:none">mod_parallels_xld</span></code> selects XLD parallels enclosing
homogeneous areas from the input parallels <a href="#Parallels"><i><code><span data-if="hdevelop" style="display:inline">Parallels</span><span data-if="c" style="display:none">Parallels</span><span data-if="cpp" style="display:none">Parallels</span><span data-if="com" style="display:none">Parallels</span><span data-if="dotnet" style="display:none">parallels</span><span data-if="python" style="display:none">parallels</span></code></i></a>.
The parameter <a href="#Image"><i><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></i></a> contains the corresponding gray value
image.
</p>
<p>Only parallels having a quality factor larger than
<a href="#Quality"><i><code><span data-if="hdevelop" style="display:inline">Quality</span><span data-if="c" style="display:none">Quality</span><span data-if="cpp" style="display:none">Quality</span><span data-if="com" style="display:none">Quality</span><span data-if="dotnet" style="display:none">quality</span><span data-if="python" style="display:none">quality</span></code></i></a> are examined.  The algorithm performs parallel
cross sections one pixel apart, and parallel to the line segments in
the area of overlap between two parallel line segments.
</p>
<p>In the first iteration, the mean gray value for each of the lines in
the cross section is calculated.  In the second iteration, the
standard deviations of the gray values along each line are computed.
</p>
<p>If the mean gray value of an area between parallels lies in the
interval [<a href="#MinGray"><i><code><span data-if="hdevelop" style="display:inline">MinGray</span><span data-if="c" style="display:none">MinGray</span><span data-if="cpp" style="display:none">MinGray</span><span data-if="com" style="display:none">MinGray</span><span data-if="dotnet" style="display:none">minGray</span><span data-if="python" style="display:none">min_gray</span></code></i></a>,<a href="#MaxGray"><i><code><span data-if="hdevelop" style="display:inline">MaxGray</span><span data-if="c" style="display:none">MaxGray</span><span data-if="cpp" style="display:none">MaxGray</span><span data-if="com" style="display:none">MaxGray</span><span data-if="dotnet" style="display:none">maxGray</span><span data-if="python" style="display:none">max_gray</span></code></i></a>], and if the mean of
all standard deviations is smaller than the upper threshold
<a href="#MaxStandard"><i><code><span data-if="hdevelop" style="display:inline">MaxStandard</span><span data-if="c" style="display:none">MaxStandard</span><span data-if="cpp" style="display:none">MaxStandard</span><span data-if="com" style="display:none">MaxStandard</span><span data-if="dotnet" style="display:none">maxStandard</span><span data-if="python" style="display:none">max_standard</span></code></i></a>, the corresponding parallels are returned as
modified parallels in <a href="#ModParallels"><i><code><span data-if="hdevelop" style="display:inline">ModParallels</span><span data-if="c" style="display:none">ModParallels</span><span data-if="cpp" style="display:none">ModParallels</span><span data-if="com" style="display:none">ModParallels</span><span data-if="dotnet" style="display:none">modParallels</span><span data-if="python" style="display:none">mod_parallels</span></code></i></a>.
</p>
<p>In a second step, all polygon segments adjacent to parallels
bordering homogeneous areas are checked for homogeneity.  To do so,
a rectangle having the width of the last area enclosed by a
modified parallel is constructed, and checked for homogeneity using
the algorithm described above.  This process is continued as long as
there are adjacent polygon segments.  The polygons thus found are
returned as extended parallels in <a href="#ExtParallels"><i><code><span data-if="hdevelop" style="display:inline">ExtParallels</span><span data-if="c" style="display:none">ExtParallels</span><span data-if="cpp" style="display:none">ExtParallels</span><span data-if="com" style="display:none">ExtParallels</span><span data-if="dotnet" style="display:none">extParallels</span><span data-if="python" style="display:none">ext_parallels</span></code></i></a>.</p>
<h2 id="sec_execution">运行信息</h2>
<ul>
  <li>多线程类型:可重入(与非独占操作符并行运行)。</li>
<li>多线程作用域:全局(可以从任何线程调用)。</li>
  <li>未经并行化处理。</li>
</ul>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="Parallels" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Parallels</span><span data-if="c" style="display:none">Parallels</span><span data-if="cpp" style="display:none">Parallels</span><span data-if="com" style="display:none">Parallels</span><span data-if="dotnet" style="display:none">parallels</span><span data-if="python" style="display:none">parallels</span></code></b> (input_object)  </span><span>xld_para-array <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HXLDPara.html">HXLDPara</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HXLDPara.html">HXLDPara</a></span><span data-if="c" style="display:none">Hobject</span></span>
</div>
<p class="pardesc">Input XLD parallels.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Image" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Image</span><span data-if="c" style="display:none">Image</span><span data-if="cpp" style="display:none">Image</span><span data-if="com" style="display:none">Image</span><span data-if="dotnet" style="display:none">image</span><span data-if="python" style="display:none">image</span></code></b> (input_object)  </span><span>singlechannelimage <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HImage.html">HImage</a></span><span data-if="c" style="display:none">Hobject</span> (byte)</span>
</div>
<p class="pardesc">Corresponding gray value image.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="ModParallels" class="parname"><b><code><span data-if="hdevelop" style="display:inline">ModParallels</span><span data-if="c" style="display:none">ModParallels</span><span data-if="cpp" style="display:none">ModParallels</span><span data-if="com" style="display:none">ModParallels</span><span data-if="dotnet" style="display:none">modParallels</span><span data-if="python" style="display:none">mod_parallels</span></code></b> (output_object)  </span><span>xld_mod_para-array <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HXLDModPara.html">HXLDModPara</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HXLDModPara.html">HXLDModPara</a></span><span data-if="c" style="display:none">Hobject *</span></span>
</div>
<p class="pardesc">Modified XLD parallels.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="ExtParallels" class="parname"><b><code><span data-if="hdevelop" style="display:inline">ExtParallels</span><span data-if="c" style="display:none">ExtParallels</span><span data-if="cpp" style="display:none">ExtParallels</span><span data-if="com" style="display:none">ExtParallels</span><span data-if="dotnet" style="display:none">extParallels</span><span data-if="python" style="display:none">ext_parallels</span></code></b> (output_object)  </span><span>xld_ext_para-array <code>→</code> <span data-if="hdevelop" style="display:inline">object</span><span data-if="dotnet" style="display:none"><a href="HXLDExtPara.html">HXLDExtPara</a></span><span data-if="python" style="display:none">HObject</span><span data-if="cpp" style="display:none"><a href="HXLDExtPara.html">HXLDExtPara</a></span><span data-if="c" style="display:none">Hobject *</span></span>
</div>
<p class="pardesc">Extended XLD parallels.</p>
</div>
  <div class="par">
<div class="parhead">
<span id="Quality" class="parname"><b><code><span data-if="hdevelop" style="display:inline">Quality</span><span data-if="c" style="display:none">Quality</span><span data-if="cpp" style="display:none">Quality</span><span data-if="com" style="display:none">Quality</span><span data-if="dotnet" style="display:none">quality</span><span data-if="python" style="display:none">quality</span></code></b> (input_control)  </span><span>number <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Union[float, int]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real / </span><span data-if="hdevelop" style="display:inline">integer)</span><span data-if="dotnet" style="display:none"> (<i>double</i> / </span><span data-if="dotnet" style="display:none">int / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>double</i> / </span><span data-if="cpp" style="display:none">Hlong)</span><span data-if="c" style="display:none"> (<i>double</i> / </span><span data-if="c" style="display:none">Hlong)</span></span>
</div>
<p class="pardesc">Minimum quality factor (measure of parallelism).</p>
<p class="pardesc"><span class="parcat">Default:
      </span>0.4</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span>0.1, 0.2, 0.3, 0.4, 0.5, 0.6</p>
<p class="pardesc"><span class="parcat">Restriction:
      </span><code>0.0 &lt;= Quality &amp;&amp; Quality &lt;= 1.0</code></p>
</div>
  <div class="par">
<div class="parhead">
<span id="MinGray" class="parname"><b><code><span data-if="hdevelop" style="display:inline">MinGray</span><span data-if="c" style="display:none">MinGray</span><span data-if="cpp" style="display:none">MinGray</span><span data-if="com" style="display:none">MinGray</span><span data-if="dotnet" style="display:none">minGray</span><span data-if="python" style="display:none">min_gray</span></code></b> (input_control)  </span><span>integer <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">int</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>int</i> / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Minimum mean gray value.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>160</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span>80, 100, 120, 140, 160, 180</p>
<p class="pardesc"><span class="parcat">Restriction:
      </span><code>0 &lt;= MinGray &amp;&amp; MinGray &lt;= 255</code></p>
</div>
  <div class="par">
<div class="parhead">
<span id="MaxGray" class="parname"><b><code><span data-if="hdevelop" style="display:inline">MaxGray</span><span data-if="c" style="display:none">MaxGray</span><span data-if="cpp" style="display:none">MaxGray</span><span data-if="com" style="display:none">MaxGray</span><span data-if="dotnet" style="display:none">maxGray</span><span data-if="python" style="display:none">max_gray</span></code></b> (input_control)  </span><span>integer <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">int</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (integer)</span><span data-if="dotnet" style="display:none"> (<i>int</i> / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>Hlong</i>)</span><span data-if="c" style="display:none"> (<i>Hlong</i>)</span></span>
</div>
<p class="pardesc">Maximum mean gray value.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>220</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span>140, 160, 180, 200, 220, 240</p>
<p class="pardesc"><span class="parcat">Restriction:
      </span><code>0 &lt;= MaxGray &amp;&amp; MaxGray &lt;= 255 &amp;&amp; MaxGray &gt;= MinGray</code></p>
</div>
  <div class="par">
<div class="parhead">
<span id="MaxStandard" class="parname"><b><code><span data-if="hdevelop" style="display:inline">MaxStandard</span><span data-if="c" style="display:none">MaxStandard</span><span data-if="cpp" style="display:none">MaxStandard</span><span data-if="com" style="display:none">MaxStandard</span><span data-if="dotnet" style="display:none">maxStandard</span><span data-if="python" style="display:none">max_standard</span></code></b> (input_control)  </span><span>number <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">Union[float, int]</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (real / </span><span data-if="hdevelop" style="display:inline">integer)</span><span data-if="dotnet" style="display:none"> (<i>double</i> / </span><span data-if="dotnet" style="display:none">int / </span><span data-if="dotnet" style="display:none">long)</span><span data-if="cpp" style="display:none"> (<i>double</i> / </span><span data-if="cpp" style="display:none">Hlong)</span><span data-if="c" style="display:none"> (<i>double</i> / </span><span data-if="c" style="display:none">Hlong)</span></span>
</div>
<p class="pardesc">Maximum allowed standard deviation.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>10.0</p>
<p class="pardesc"><span class="parcat">Suggested values:
      </span>5.0, 10.0, 15.0, 20.0</p>
<p class="pardesc"><span class="parcat">Restriction:
      </span><code>MaxStandard &gt;= 0.0</code></p>
</div>
<h2 id="sec_predecessors">可能的前置算子</h2>
<p>
<code><a href="gen_parallels_xld.html"><span data-if="hdevelop" style="display:inline">gen_parallels_xld</span><span data-if="c" style="display:none">gen_parallels_xld</span><span data-if="cpp" style="display:none">GenParallelsXld</span><span data-if="com" style="display:none">GenParallelsXld</span><span data-if="dotnet" style="display:none">GenParallelsXld</span><span data-if="python" style="display:none">gen_parallels_xld</span></a></code>
</p>
<h2 id="sec_successors">可能的后置算子</h2>
<p>
<code><a href="max_parallels_xld.html"><span data-if="hdevelop" style="display:inline">max_parallels_xld</span><span data-if="c" style="display:none">max_parallels_xld</span><span data-if="cpp" style="display:none">MaxParallelsXld</span><span data-if="com" style="display:none">MaxParallelsXld</span><span data-if="dotnet" style="display:none">MaxParallelsXld</span><span data-if="python" style="display:none">max_parallels_xld</span></a></code>
</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="info_parallels_xld.html"><span data-if="hdevelop" style="display:inline">info_parallels_xld</span><span data-if="c" style="display:none">info_parallels_xld</span><span data-if="cpp" style="display:none">InfoParallelsXld</span><span data-if="com" style="display:none">InfoParallelsXld</span><span data-if="dotnet" style="display:none">InfoParallelsXld</span><span data-if="python" style="display:none">info_parallels_xld</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
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